Section 03 ENGINE
Sub-Section 11 (CARBURETOR AND FUEL PUMP)
03-11-8
TYPICAL
1. Drill bit used as gauge for throttle slide height
IDLE SPEED FINAL ADJUSTMENT
7, Idle Speed Screw
Start engine and allow it to warm then adjust idle
speed to specifications by turning
idle speed
screw clockwise to increase engine speed or
counterclockwise to decrease it.
NOTE: On twin-carburetor models:
Turn
adjustment screw the same amount to keep
carburetors synchronized.
Refer to TECHNICAL DATA 09 for the specifica-
tions.
CHOKE
MX Z 440F and Skandic WT/SWT/WT LC
Choke Plunger Adjustment
Adjust cable length to obtain a slight contact be-
tween plunger and tool (P/N 529 0321 00). Re-
tighten lock nut.
HAC SYSTEM
Summit Only
HAC (High Altitude Compensator) is a mainte-
nance free device.
No adjustment and verification can be done on
HAC.
If HAC is suspected to be faulty, replace it and
check for improvement.
Hoses connected to HAC must not be altered in
length or size. Check for kinked or loose hoses.
Tighten or replace as necessary. See below illus-
trations for routing.
Nut holding T-fitting must be torqued to 6 N•m (53
lbf•
in
).
Models
Throttle Slide Height
mm (in)
MX Z 440 F 1.5 (.059)
MX Z 440 1.8 (.071)
MX Z 583 2.0 (.078)
MX Z 670 2.1 (.083)
Formula 500/500 DL 1.8 (.071)
Formula 583 2.0 (.078)
Formula Z 2.0 (.078)
Summit 500 2.0 (.078)
Summit 583 2.3 (.090)
Summit 670 2.3 (.090)
Grand Touring 500 1.8 (.071)
Grand Touring 583 2.0 (.078)
Skandic WT/SWT 1.3 (.051)
Skandic WT LC 1.5 (.059)
A01C3NA
1
-
CAUTION
Do not attempt to set the idle speed by using
the air screw. Severe engine damage can oc-
cur.
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